Abstract
Plastic film is produced by Roll-to-Roll system. In this system, winding process is the final section of the producing line, which influences the quality of film. Therefore, winding process is very important. However, the film thickness distribution becomes larger by film-firming processes, printed electronics and laminating processes in this system. As a result, film thickness is not uniform in the width direction and it leads to gauge band in the wound roll. In this case, internal stress changes in the width direction. In addition, the film thickness distribution is changed by the elastic deformation. Therefore, it is necessary to understand the internal stress to prevent roll defect in wound roll. In this study, a winding model considering the film thickness variation and the elastic deformation is presented and experimentally verified. As a result, the predicted values are in good agreement with the measured values.
