Precoated metal sheet, method for manufacturing precoated metal sheet, and continuous coating device

摘要

To purpose of the present invention is to obtain high levels of both the adhesiveness between coatings and the glossiness in a multilayer precoated metal sheet produced on a continuous coating line. A precoated metal sheet having a plurality of coating layers on one or both sides of a metal sheet (10), wherein the coating layers include: a coloring coating layer (111) disposed on the metal sheet (10) side, the coloring coating layer (111) containing a coloring pigment; a pigment-enriched layer (123) formed on the coloring coating layer (111), the pigment-enriched layer (123) having a coloring pigment concentration higher than the average coloring pigment concentration in the coloring coating layer (111), and the coloring pigment concentration increasing towards the obverse layer side; a diffusion layer (122) formed on the pigment-enriched layer (123), the diffusion layer (122) having a coloring pigment concentration that decreases towards the obverse surface side; and a clear layer (121) formed on the diffusion layer (122), the clear layer (121) containing no coloring pigment. The ratio d1/d2 between the thickness d1 of the clear layer (121) and the thickness d2 of the pigment-enriched layer (123) is 1.7≤d1/d2≤4.7.