COATING METHOD WITH ELECTRON-BEAM-CURABLE AQUEOUS COATING MATERIAL

To provide a coating method with an electron-beam-curable aqueous coating material in which the occurrence of sagging during drying is suppressed, and which can form a cured coating film excellent in surface smoothness.SOLUTION: In a coating method with an electron-beam-curable aqueous coating material, the electron-beam-curable aqueous coating material is applied on the surface of an object to be coated, thereby forming a wet coating film. The wet coating film is dried until the time-integrated value of the reciprocal of an average viscosity value in a region from the surface of the wet coating film to the depth of a 1/2 film thickness which is obtained by an electric-field pickup method reaches 0.30 to 0.90 (Pa s)-1 min, and the solid content concentration of the wet coating film reaches 90 mass% or greater. Then, the dried coating film obtained is cured by irradiation with an electron beam.SELECTED DRAWING: None 【課題】乾燥時のタレの発生が抑制され、表面平滑性に優れた硬化塗膜を形成することが可能な電子線硬化型水性塗料の塗装方法を提供すること。【解決手段】被塗物の表面に電子線硬化型水性塗料を塗布してウェット塗膜を形成し、電場ピックアップ法により求められる、前記ウェット塗膜の表面から膜厚の１／２深さまでの領域の粘度の平均値の逆数の時間積分値が０．３０〜０．９０（Ｐａ・ｓ）−１・ｍｉｎとなり、かつ、前記ウェット塗膜の固形分濃度が９０質量％以上となるまで、前記ウェット塗膜を乾燥させた後、得られた乾燥塗膜を電子線照射により硬化させる、ことを特徴とする電子線硬化型水性塗料の塗装方法。【選択図】なし