Patch having easily detachable release sheet

Abstract

A patch permitting division of only its release sheet by simply pulling right and left, wherein detachment of the release sheet is easy. There is provided a patch comprising a stretchable support, a plaster applied substantially all over one major surface of the support and a release sheet attached to the whole surface of the plaster wherein only the release sheet is divided at a division zone by simply pulling right and left, and wherein one or two or more precut parts that open when the patch is pulled right and left are disposed in the neighborhood on the division zone.

The invention claimed is: 
     
       1. A patch comprising:
 (a) a stretchable support,; 
 (b) an adhesive mass laminated substantially all over one surface of the support; and 
 (c) a release sheet with:
 (i) a division zone; and   (ii) one or more precut parts in addition to the division zone positioned near but separate from the division zone;   
 said release sheet being attached to the entire surface of the adhesive mass;  
 wherein only the release sheet of the patch is divided at a the division zone by simply pulling apart the patch, and 
 wherein the one or more precut parts that in addition to the division zone positioned near but separate from the division zone are opened when the patch is pulled apart are provided in the release sheet near the division zone so that edges of the divided release sheet turn up upon pulling apart to facilitate detachment of the release sheet from the adhesive mass and to prevent re-sticking of the release sheet. 
 
     
     
       2. The patch according to  claim 1 , wherein the division zone is arranged in an S-shaped pattern, a wavy pattern or a zigzag pattern. 
     
     
       3. The patch according to  claim 1 , wherein the division zone is arranged in a straight-line pattern. 
     
     
       4. The patch according to  claim 1 , wherein the division zone is arranged in a T-shaped pattern. 
     
     
       5. The patch according to  claim 4 , wherein the longitudinal bar of a T-shape is parallel to pulling direction of the patch and the tip of said longitudinal bar is pointed toward the division zone. 
     
     
       6. The patch according to  claim 1 , wherein the precut part is provided convexly toward the pulling directions from the division zone. 
     
     
       7. The patch according to  claim 6 , wherein the division zone is arranged in a V-shaped pattern or a circular arc pattern. 
     
     
       8. The patch according to  claim 1 , wherein the release sheet is one piece of release sheet having a division zone, and only the release sheet is divided at the division zone due to the difference in a rate of elongation between the release sheet and the support by simply pulling the patch apart. 
     
     
       9. The patch according to claim 1, wherein the precut parts are provided in the form of a T-shaped pattern.  
     
     
       10. The patch according to claim 9, wherein the longitudinal bar of a T-shape is parallel to pulling direction of the patch and the tip of said longitudinal bar is pointed toward the division zone.  
     
     
       11. The patch according to claim 6, wherein the precut parts are provided in the form of a V-shaped pattern or a circular arc pattern.