Solution film-forming method, protective film of polarizing plate, optical functional film, polarizing plate, and liquid crystal display device
AssigneeFuji Photo Film Co., Ltd.
InventorHidekazu Yamazaki
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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.
Claims20
A solution film-forming method for obtaining a polymer film comprising discharging a pressurized polymer solution from a casting die, casting the polymer solution on a support, solidifying the polymer solution to form a film on the support, peeling the film from the support 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 discharged on the support from the casting die are E1 (Pascal) and n (Pascal·second), respectively.
Dependencies are inferred from the claim text.