抄録
Thin and flexible continuous medium plastic film is called web. The web is supported by a number of rollers and conveyed, finally it is wound into a roll. Therefore, roll-to-roll system enables mass producing with high efficiency because this system is able to apply work to the web continuously by just a single producing line. The winding process of roll-to-roll system is important in order to be integrated into a single roll of large amounts of web. However, there is the occurrence of defects such as slip and wrinkles caused by the winding conditions, and such defects make a reduction of the product quality of web. In addition, film thickness distribution occurs on the web in lamination process because a number of webs are generally laminated. These defects are dependent on the state of internal stress in wound roll, therefore it is necessary to prevent defect to certainly by understanding the stress state internal wound roll In this study, we discussed experimentally relation between web thickness variation and internal stress distribution. As a result, it is understood that the film thickness distribution occurs in the width direction.
