| 摘要 |
PURPOSE:To enable loading of a flexible magnetic disc sheet to a device without eccentricity by providing a pasty protective film contg. a solid lubricating agent to the circumferential edge in the central circular hole of said sheet. CONSTITUTION:A pasty, oily or greasy protective layer contg. a solid lubricating agent is provided to the circumferential edge in the central circular hole 2a of a flexible magnetic disc sheet 2. Graphite, molybdenum disulfide, tungsten disulfide and boron nitride are used as the solid lubricating agent. |
