| abstract |
A solution film-forming method for obtaining the polymer film includes discharging a pressurized polymer solution having a specific temperature from a casting die, casting the polymer solution on a support, solidifying the polymer solution to form a film, peeling and drying the film, wherein the polymer solution to be cast on the support is mixed with a specific solvent such that E1/n is larger than 0.1 (l/second) and smaller than 3.0 (l/second) when the dynamic modulus of rigidity and dynamic coefficient of viscosity of the polymer solution immediately after discharged on the support from the casting die are E1 (Pascal) and n (Pascal·second), respectively. |