METHOD FOR MANUFACTURING PACKAGING FILM WHICH CAN BE TORN IN SPECIFIC PLANAR FORM

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a packaging film which can be torn in a specific planar form along a formed curve to be cut by a means other than stretching a cut tape. SOLUTION: A film surface roughening tool is brought into sliding contact with a continuous film F1 and then is reciprocated in the transverse direction so that two continuous curves K1 and K2 to be cut are formed by scratching. The curves K1 and K2 are formed in such a manner that the interval between the curves K1 and K2 is narrow at a position where the curves K1 and K2 correspond to cut marks (m) printed on the film and the interval is wide at a position where the curves K1 and K2 are away from the cut marks (m).