B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 75/10 (2006.01) B65H 75/50 (2006.01)
Patent
CA 2648113
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.
La présente invention concerne un élément central pour un ruban adhésif sensible à la pression qui comprend une partie structurelle telle qu'un tube en carton enroulé et un pli de film polymère entouré sur la surface externe de la partie structurelle et y adhérant. Ledit pli comporte un revêtement de libération sur sa surface externe pour permettre qu'un ruban adhésif enroulé sur l'élément central se libère facilement et proprement du noyau lors du déroulement. Ledit pli comporte un joint de recouvrement entre ses bords opposés. Ledit joint peut être soudé par ultrasons lors de la formation de l'élément central du ruban. Dans une variante, le revêtement de libération le long du bord sous-jacent dudit joint est retiré par un solvant avant la formation dudit joint.
Niu Xiaokai
Rhodes David E.
Rummage Tony F.
Sim & Mcburney
Sonoco Development Inc.
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