Film surface considerations for enhanced winding of thin films
Abstract
The primary defect for thin films ( < 25μm ) consists of sinusoidal ridges that run around the wound roll of film. Previous work has shown that these defects are buckles caused by compressive stresses in the transverse direction and that their formation can be minimized by adjusting winding conditions. The work presented here shows that the film surface also has a critical role in controlling this defect. The effort includes (1) measurements of properties for films with differing surfaces, (2) calculations to determine whether buckles will occur, and (3) winding experiments to verify the conclusions. Recommendations are included to design surfaces that are resistant to internal buckles and their related defects.
Citation
Forrest, A. W., Jr., & Anderson, V. L. (1997, June). Film surface considerations for enhanced winding of thin films. Paper presented at the Fourth International Conference on Web Handling (IWEB), Stillwater, OK.