| 摘要 |
PROBLEM TO BE SOLVED: To apply a polishing film suitable to use in a working process to varnish without shifting ionic impurities from the polishing film to a hard disc protective layer surface extensively to a high polishing rate from a low polishing rate. SOLUTION: This polishing film for varnishing has a polishing layer 4 including abrasive particulates 2 and a surface coating agent 1 or a binding agent 3 of the abrasive particulates 2. In this case, the surface coating agent or the binding agent is to be polyurethane resin added with one or more than two of hydrophilic functional groups of -SO3H, -COOH, -NH2. |
