Method and apparatus for correcting curling of film and method of manufacturing laminated film

摘要

Curling of a laminated film is efficiently corrected. The water vapor is brought into contact with the base layer on the outside of the laminated film in a curled state during the first phase transition process. The glass transition temperature of the base layer is lowered. In the base layer, phase transition from the glass state to the rubber state occurs. Supply of the water vapor to the base layer is stopped in the second phase transition process. In the base layer, phase transition from the rubber state to the glass state occurs. The phase transition creates curling that can correct the original curl. The original curl can be corrected by continuously carrying out the first phase transition process and the second phase transition process. The cooling process for cooling the hard coating layer is carried out while the first phase transition process is carried out.

主权项

1. A method for correcting curling of a film, comprising:
a first phase transition process in which water vapor having a higher temperature than an outside surface of the film is brought into contact with the outside surface of the film until an outer layer in a glass state, which is exposed to the outside surface of the film in a curled state, is turned into a rubber state, a second phase transition process in which the contact of the water vapor is stopped until the outer layer in the rubber state is turned into a glass state, and a cooling process in which an inside surface of the curled film is cooled while the first phase transition process is carried out.