JPS6336024Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure-sensitive adhesive sheet piece, and more specifically to a pressure-sensitive adhesive sheet piece having a structure that allows easy removal of a release material.

Conventionally, adhesive sheet pieces used for labels and medical purposes are known to have a layer of adhesive material provided on a support, and the surface of the layer is further coated with a release material. When using these adhesive sheet pieces, the release material is removed and then attached to the adherend. However, if the release material is thin or has no elasticity, the release material must be peeled off from the edge. However, in order to provide easy peelability, a cut line is provided in the center of the release material, and the release material is peeled from the cut line. However, in the above-mentioned shape, it was difficult to remove the release material when a thin adhesive sheet piece or a highly adhesive substance was used as the support. On the other hand, for medical adhesive sheet pieces that are applied to the skin, the thickness of the support is made thinner in order to reduce discomfort, and there is no wrinkling of the support from the effective side to the skin surface, allowing for complete adhesion. Since it is necessary to apply the adhesive so that it adheres to the skin, a part of the release material is removed, the exposed adhesive surface is applied to the skin, and the remaining release material is gradually removed. This is desirable from this point of view. Therefore, there has been a need for a pressure-sensitive adhesive sheet that is easier to peel and remove.

The inventors of the present invention have investigated adhesive sheet pieces that have a shape that allows the release material to be easily removed from the adhesive sheet piece and that can be reliably affixed to the position on the adherend. It has been found that by curving the adhesive sheet piece in the direction of the cut line, the release material can be easily removed from the adhesive sheet piece.

That is, the present invention is an adhesive sheet piece in which the surface of an adhesive material layer laminated on a support is covered with a release material having greater rigidity than the support. To provide an adhesive sheet piece curved in the direction of the incision line.

Hereinafter, examples of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a perspective view of an example of the adhesive sheet piece of the present invention, in which 1 is a support made of various plastic films, woven fabrics, non-woven fabrics, papers, metal foils, etc.;
2 is an adhesive layer made of acrylic, rubber, etc. that is sticky at room temperature; 3 is a base material that is more rigid than the support 1 and has been subjected to a release treatment such as silicone treatment, such as plastic or paper; It is a release material made of After providing the release material 3 with a single score line 4 approximately in the center, the treated surface is coated so as to be in contact with the adhesive material layer 2, and the adhesive sheet piece is cut along the score line so that the support side is the outer curved surface. It is curved in the direction.

FIG. 2 is a perspective view of another example of the present invention, in which the adhesive sheet piece shown in FIG. 1 is curved so that the release material side becomes the outer curved surface.

Figures 3 and 4 refer to Figures 1 and 2, respectively.
This corresponds to the figure, and shows a state in which each piece of the adhesive sheet is bent in a direction in which the supports are in contact with each other via the score line 4.

The adhesive sheet piece of the present invention is produced by, for example, coating and laminating an adhesive material layer 2 on a support 1, and pasting a release material 3 having a score line 4 so that the score line 4 is parallel to the coating flow direction. After that, it is wound into a roll while applying tension to give sufficient distortion and curve, and then cut into a predetermined length.

Another method is to apply a hot air treatment or humidification treatment to a piece of adhesive sheet covered with a release material provided with score lines 4 to shrink or expand one or both of the support and the release material. It can also be obtained by curving the piece.

Still another method is to press the adhesive sheet piece on a curved plate, but when using this method, it can be curved more reliably by hot pressing.

The degree of curvature of the above adhesive sheet piece is approximately 30mm to approximately 2000mm.
It is effective to have a radius of curvature in the range of mm, preferably in the range of 50 mm to 500 mm.

As described above, since the adhesive sheet piece of the present invention is curved in the direction of the cut line provided in the release material that is more rigid than the support, the third
As is clear from the figure and FIG. 4, when the release material is bent along the score line, the end of the release material peels off from the adhesive layer and lifts up due to the elasticity caused by the rigidity of the release material. The release material can be easily removed by grasping the part, and even if the support is a thin piece of adhesive sheet, the release material can be applied while being gradually peeled off, so there is no wrinkles in the support. This has the effect that it can be closely attached to an adherend without any problems.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of actual examples of the adhesive sheet piece of the present invention, and Figures 3 and 4 are perspective views of the adhesive sheet pieces of Figures 1 and 2 when they are folded. . DESCRIPTION OF SYMBOLS 1... Support body, 2... Adhesive substance layer, 3... Release material, 4... Cut line.

Claims (1)

[Scope of utility model registration request] It is an adhesive sheet piece formed by covering the surface of an adhesive substance layer laminated on a support with a release material having greater rigidity than the support, and the release material is provided with a score line and curved in the direction of the score line. An adhesive sheet piece.