| 摘要 |
Provided is a method for producing a multilayer film which has excellent adhesion with a film base and a hardening layer, transparency, and hardness. A first solution (31) contains a hardening compound but does not contain cellulose acylate. A second solution (32) contains cellulose acylate and does not contain a hardening compound. The first solution (31) and the second solution (32) are co-cast so that a cast film (41) is formed. By means of a preliminary hardening device (48), ultraviolet rays are irradiated onto the caste film (41) having a ratio of the amount of a first solvent and a second solvent for a dried film produced by drying the cast film (41) at 100% or more. The cast film (41) passed through the preliminary hardening device (48) is dried and applied with magnetic supporting properties in order to be peeled from a drum (46). A wet film (42) formed through peeling is dried so that a dried film (51) is produced. Ultraviolet rays are irradiated onto the dried film (51) by means of a film hardening device (37), so that the hardening compound is hardened. |
