| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for forming a coating film, which method is a 3-coat 1-bake one for forming a coating film by using a water-based coating material, wherein sagging, etc., do not occur even under low-temperature high-humidity atmosphere, and the orientation of the constituent metallic pigment can be controlled even when the coating material used is a water-based one, and the energy required for conditioning can be markedly reduced. SOLUTION: A method for forming a coating film comprises the steps of coating the surface of a substrate with a water-based thermosetting color coating material (A), coating the surface of the coating film with a water-based thermosetting coating material (B) containing a coloring pigment and/or a brilliant pigment and optionally pre-drying the coating film, and coating the surface of the coating film with a thermosetting clear coating material (C), and heating the three-layer coating film of (A), (B), and (C) to simultaneously curing them. The solids content of the applied coating material is controlled by a method comprising (I) injecting air controlled in temperature and/or humidity from behind the coating injection port during the coating with material A toward a direction nearly same as that in which the sprayed particles of the material A move toward the surface of the substrate so as for the air to surround a coating pattern and to come into contact with it.</p> |
