초록 ▼

A cleavable release structure composed of two release bases each having an outer surface and an inner surface; a release coating on the inner surface of each release base; a layer of a pressure sensitive adhesive adjacent the coating on the inner surface of each release base; and a clearable layer s

A cleavable release structure composed of two release bases each having an outer surface and an inner surface; a release coating on the inner surface of each release base; a layer of a pressure sensitive adhesive adjacent the coating on the inner surface of each release base; and a clearable layer sandwiched between the pressure sensitive adhesive layers, so that the cleavable layer is adapted to cleave and separate when subjected to a peeling force greater than its internal bond strength and less than the adhesion force of the pressure sensitive adhesive. Each layer of pressure sensitive adhesive should be adapted to provide an adhesion force greater than about 24 ounces per inch of width. The release coating should be adapted to provide a release level of from about 1 to about 30 grams per centimeter of width. The clearable layer should have an internal bond strength of from about 2 to about 20 ounces per inch of width.

대표청구항 ▼

A method for releasably securing the end of a roll of material to the roll, comprising: winding the material around a longitudinal axis of the roll until the end of the material is adjacent an outermost winding of the material on the roll; disposing a cleavable adhesive tape between opposing surface

A method for releasably securing the end of a roll of material to the roll, comprising: winding the material around a longitudinal axis of the roll until the end of the material is adjacent an outermost winding of the material on the roll; disposing a cleavable adhesive tape between opposing surfaces of the end of the material and the outermost winding, the cleavable adhesive tape including a cleavable layer having a first side and a second side, said first side being coated with a first pressure sensitive adhesive layer and said second side being coated with a second pressure sensitive adhesive layer; pressing the end of the material against the roll so that the adhesive layers of the cleavable adhesive tape adhere to the end of the material and the outermost winding respectively; and releasing the end of the material by pulling the end of the material away from the outermost winding causing the cleavable adhesive tape to cleave along the cleavable layer, said cleavable layer having a thickness such that, when said cleavable layer is cleaved, a sufficient amount of said cleavable layer remains on said first pressure sensitive adhesive and said second pressure sensitive adhesive to cover each of said adhesive layers.