| 摘要 |
PROBLEM TO BE SOLVED: To provide a precoated metallic sheet which scarcely causes a scratch on an optical disk even when the disk comes into contact with a protrusion of the inner surface of a drive of an electric or electronic device. SOLUTION: This scratch-resistant precoated metallic sheet is a metallic sheet such as an aluminum alloy sheet with a chemical conversion film on the one surface thereof, wherein the film comprises a base resin, a bead resin, and a lubricant and has an arithmetic mean roughness Ra of 1.3 to 6.2μm, an average length RSm of a profile curve element of 300 to 550μm, and a coefficient of dynamic friction of 0.20 or lower. COPYRIGHT: (C)2006,JPO&NCIPI
|
