Abstract
An experimental study was carried out to investigate the solution casting process. Two viscous Newtonian liquids, aqueous glycerol solutions(viscosity between 110mPa.s and 1900mPa.s) and corn syrup(viscosity between 120mPa.s and 10500mPa.s) were used as test fluids and coated on dry PET film for observation. Several interesting defects were identified, such as vibrating edges and unstable pools in the neighborhood of the die lip region. The operating windows were studied as function of fluid viscosity、coating gaps, and different die lips.