PROCESS AND APPARATUS FOR THE PRODUCTION OF A SANDWICH SHEET

摘要

Process for the production of a blister sheet which comprises the following steps: a) extrusion (1) of a bottom film (7), a central film (8), a top film (7) starting from the corresponding granule; b) thermoforming (3) of the central film; c) calibration and partial cooling (5) of the bottom and top films; d) heating of at least one side of the bottom and top films and coupling of the two bottom and top films with the thermoformed film.