METHOD AND DEVICE FOR MAKING A CONTINUOUS STRIP OF A HIGHLY ADHESIVE PRODUCT PACKAGED IN A THERMOPLASTIC FILM

摘要

A process for manufacturing a continuous strip of self-sealing product having very low hardness, being very elastic and highly tacky, the strip being intended for feeding a converting machine, during which a thermoplastic protective film is deposited on the surface of the strip. The process includes a step during which a strip of self-sealing product P is extruded to a first cross section (S0) at the outlet of the extrusion die (10). The strip is surrounded over its entire perimeter using a thermoplastic film (20) by welding the film to itself, after having deposited the film (20) around the strip. The strip is calendered in order to bring it down to a second cross section (S2), smaller in area than the first cross section.