Diffusion device(Belt cast)

In the casting machine, a resin dissolved in a solvent and liquefied is cast and applied from a casting die on an endlessly rotating steel belt, the solvent is volatilized and removed by heating, and then the resin is peeled off and formed into a film. It is a device to do. It has advantages such as no molecular orientation, high thickness accuracy, and no need for high temperature heating process, and is used for molding optical films such as TAC.