Patent ID: 9011624
Filing Date: 2015-04-21
Classification: C09J,Y10T

Abstract:
1. A method for manufacturing an adhesive sheet comprising a long peeling base material and an adhesive layer provided on the peeling base material in the form of an island, the method comprising: laminating a long adhesive layer on a long peeling base material; and peeling off an unnecessary portion of the long adhesive layer so that a predetermined portion of the adhesive layer is left on the long peeling base material in the form of an island, wherein, in the peeling step, a ratio of the width of a narrow portion, which is the narrowest in width in a short direction of the unnecessary portion of the adhesive layer, to the overall width of the adhesive sheet in the short direction is 12% or more, and the breaking strength in the narrow portion is 200 g or more.