MANUFACTURE OF FILM-LIKE TUBULAR BODY

摘要

PURPOSE:To provide proper manufacturing method for obtaining excellent film-like tubular body having neither seam nor fold. CONSTITUTION:When a tubular film 20 extruded from an annular die is formed, the constitution, wherein the tubular film is taken without making folds by nipping only the intermediate part of the tubular film 20 with nip rolls 5 after the film is cooled to a predetermined diameter under tubular state and, after that, cut to the predetermined dimensions.