EXPERIMENTAL STUDY ON PREVENTING WEB DEFECTS UNDER TRANSPORTATION OF HIGH PERFORMANCE OPTICAL FILMS WITH MICRO- GROOVE AND CONCAVE ROLLERS

摘要

In this paper, experiments on preventing wrinkles by using concave rollers compared with cylindrical rollers are described. Wrinkle generation is examined using the following four test rollers: a cylindrical roller with a uniform axial diameter, a cylindrical roller with micro-grooves, a concave roller with a diameter that increases towards the two ends, and a concave roller with micro-grooves. Moreover, the relationship between the use of a concave roller and wrinkle generation is clarified by comparing all experimental results.