CORES FOR PRESSURE-SENSITIVE ADHESIVE TAPE, AND METHODS FOR MAKING SAME

摘要

A core for pressure-sensitive adhesive tape comprises a structural portion such as a wound paperboard tube, and a polymer film ply wrapped about the outer surface of the structural portion and adhered thereto. The polymer film ply has a release coating on its outer surface to allow an adhesive tape wound onto the core to readily and cleanly release from the core during unwinding. The polymer film ply has a lap joint between its opposite edges. The lap joint can be ultrasonically welded during formation of the tape core. Alternatively, the release coating along the underlying edge of the lap joint is removed by a solvent prior to formation of the lap joint.