Method of drying polymeric film and method of producing polymeric water-vapor barrier film
AssigneeFUJIFILM Corporation
InventorsKeio OKANO, Takao TAGUCHI
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Abstract
A method of drying polymeric film, the polymeric film being formed by applying on a support a coating solution containing a polymeric compound having water vapor barrier properties, at least one organic solvent and a compound having a hydrophilic functional group which has a water solubility of 0.3 to 7 g/100 mL at 25° C., the method including: a hot air drying step in which the polymeric film is dried to the dry point by hot air, and a steam drying step in which drying is performed with steam.
Claims11
A method of drying polymeric film, the polymeric film being formed by applying on a support a coating solution containing a polymeric compound having water vapor barrier properties, at least one organic solvent and a compound having a hydrophilic functional group which has a water solubility of 0.3 to 7 g/100 mL at 25° C., the method comprising:
- a hot air drying step in which the polymeric film is dried to the dry point by hot air;
- and
- a steam drying step in which drying is performed with steam.
A method of producing a polymeric water-vapor barrier film, comprising:
- a polymeric film forming step in which a coating solution containing a polymeric compound having water vapor barrier properties, at least one organic solvent and a compound having a hydrophilic functional group which has a water solubility of 0.3 to 7 g/100 mL at 25° C., is coated on a support to form a polymeric film on the support;
- a hot air drying step in which the polymeric film is dried to the dry point by hot air;
- a steam drying step in which drying of the film is performed with steam;
- and
- a heating step in which heating is carried out at a temperature not lower than the sublimation temperature of the compound having a hydrophilic functional group.
Dependencies are inferred from the claim text.