| 摘要 |
A pre-coated metal sheet for slot-in drive cases which has a metal sheet; chemical conversion coatings formed on both sides of the metal sheet; and a coating film formed on one of the chemical conversion coatings and containing at least one base resin selected from a polyester-series resin, an epoxy- series resin and an acrylic-series resin, at least one resin beads selected from nylon-series resin beads, fluorine-series resin beads and urethane- series resin beads, and at least one lubricant a3 selected from carnauba wax, polyethylene wax and microcrystalline wax. The coating film has a surface having an arithmetical mean deviation of the assessed profile Ra of 0.3 to 4.5 Ám and a mean width of the profile elements, RSm, of 105 to 280 Ám, and the ratio of mean particle diameter of the resin beads to coating film layer thickness of the coating film is in the range of 2.0 to 3.0. |
