Method for manufacturing coated sheet, optical functional layer, optical element, and image display device

摘要

A method for manufacturing a coated sheet that may form a coated layer having a uniform film thickness by a coating liquid even when a substrate has a large area. A method for manufacturing a coated sheet to form a coated layer by a process including a process (1) for coating a coating liquid including a resin material and a solvent on a substrate, and a drying process (2) for drying a coated liquid, wherein a value L obtained in drying process (2) satisfies a following relationship; $L={\int }_0^T\frac{\mathrm{sigma}\left[\mathrm{mN}/m\right]x{\left(h\left[m\right]\right)}^3}{\mathrm{eta}\left[\mathrm{mPa}.\sec \right]}dt>1.9x{10}^{-13}\left[m^4/\sec \right]$ (where: T: total period of drying process [sec]; sigma: surface tension of coated liquid [mN/m]; h: thickness of coated liquid [m]; and eta: viscosity of coated liquid [mPa.sec]).