| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive optical film roll that suppresses defective appearance and change of optical physical properties, and has storage stability.SOLUTION: In an optical film roll taking up a stretch film subjected to knurling processing at both ends, a single average area of a deformed part to which irregularities are applied by the knurling processing is 0.05 mmor more and 5 mmor less, and the ratio of the area of a plurality of deformed parts to a knurling processing part including the deformed parts and an undeformed part to which irregularity is not applied, which is 100 mm, is 4% or more and 80% or less. |
