| 摘要 |
A surface-treated metal sheet having a coating film formed in an amount of 0.3 to 5.0 g/m<2> from a water-based organic/inorganic composite coating material which comprises: a lubricant comprising either (1) a polyolefin wax dispersion having a molecular weight of 6,000 to 15,000 or (2) a combination of a polyolefin wax dispersion (A) having a molecular weight of 6,000 to 15,000 and a polyolefin wax dispersion (B) having a molecular weight of 1,000 to 5,000; and colloidal silica of 5 to 35 wt.% on a solid basis. Also provided is a surface-treated metal sheet which has a first layer which is a coating film formed in an amount of 0.05 to 0.3 g/m<2> on a dry basis from a water-based organic/inorganic composite comprising a polyolefin wax dispersion having a molecular weight of 6,000 to 15,000 and a second layer which is a coating film formed in an amount of 0.5 to 5.0 g/m<2> on a dry basis from a water-based organic/inorganic composite comprising colloidal silica of 5 to 35 wt.% on a solid basis. The water-based organic/inorganic composite coating material with which these surface-treated metal sheets can be produced is further provided.
|
