ROLLER FOR TRANSPORTING HOLLOW FILAMENTS, MANUFACTURING METHOD FOR HOLLOW FILAMENTS, AND MANUFACTURING METHOD AND MANUFACTURING DEVICE FOR HOLLOW FILAMENT MEMBRANE SHEETS

摘要

The present invention provides a roller for transporting hollow filaments capable of mitigating, for each hollow filament, fluctuation in the tension applied to the hollow filaments in order to mitigate fluctuation in tension applied to a hollow filament by only replacing an existing driving roller, without adding, to a filament path, new rollers or devices in addition to existing rollers and devices, even when simultaneously transporting two or more hollow filaments. A transport roller (1010) for transporting two or more filaments (F) simultaneously comprises a roller body (1014), and convex strand members (1016) (tension fluctuation mitigating means) that mitigate, for each hollow filament (F), the fluctuation in the tension applied to the hollow filaments (F), wherein the convex strand members (1016) are provided, with a gap opened in the circumferential direction, in at least two locations on the circumferential face of the roller body (1014).Moreover, the present invention is a manufacturing method for hollow filament sheets that includes a connecting step, a winding step, a fixing step, and a cutting step, and for which at least one roller used in the steps is a roller having the tension fluctuation mitigating means.