| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a high-quality building board equipped with a coating film excellent not only in initial deposition of a coating film and a top coating film of activation energy ray curable ink, but also in water proofness and weather proofness with no generation of a decrease in deposition with time or cracks.SOLUTION: A manufacturing method for a building board, which enables a building board to be manufactured by forming a cured coating film on irradiation with activation energy rays after an activation energy ray curable ink containing a monomer and/or oligomer having an ethylenic unsaturated group, and then by applying top coat onto the formed cured coating film, is characterized in that the reaction rate of curing reaction to form the cured coating film is 80% or more, and in that the surface temperature of the cured coating film to apply the top coat is higher than a theoretical value of the glass transition temperature of the cured coating film calculated from the Fox equation.SELECTED DRAWING: None |
