Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
A web is a thin, flexible, continuous medium, and there are high-performance flexible products such as lithium-ion batteries and organic thin-film solar cells that use webs. There is a roll-to-roll production method, which is a production method in which the web is unwound and processes such as stretching, coating, drying, and lamination are performed continuously. This carry made it possible to reduce production costs and mass production. In the conventional conveyance process, various defects occur on the web, and expander rolls are used as a countermeasure for these defects. This is the name of a curved roller that has the property of spreading the web in the width direction. When the curved roller passes through the web, it disperses compressive stress and suppresses conveyance defects such as troughs. However, as the experimental evaluation and mechanism of the expander roll have not been clarified, in this study, we used a simulated conveyance device to evaluate the film widening performance. When evaluating the width widening performance, the amount of width widening was confirmed using a slit conveying device. As a result, it was confirmed that if the conveyance conditions other than the speed were the same, the conveyance speed had no effect on the amount of width expansion. In addition, it was confirmed that the compressive force in the width direction due to the web Poisson effect caused by excessive tension suppressed the web widening effect due to Expander roll, and the amount of widening at each contact angle uniformly decreased under high tension.
