| 摘要 |
PROBLEM TO BE SOLVED: To prevent occurrence of neck-in.SOLUTION: A method of producing a resin film includes forming a film by discharging melted resin from a die. The method includes: discharging the melted resin into a molding die unit that is previously secured to a discharge port side of a die head and has a predetermined-thickness slit; removing the molding die unit in a state in which a fluorine-based polymer electrolyte is caught in the slit; and cooling the melted resin. |
