| 摘要 |
<p>Disclosed is a film production method which provides a decompression chamber (24) disposed on the upstream side of a support body movement direction (MD) of a die (2) and shields (25) that shield fluid that flows into the decompression chamber from a support body lateral direction and are disposed at both ends of a support body in the width direction between said decompression chamber (24) and the die (2), when a solution containing a polymer material is discharged from the die (2) on to the continuously moving support body (1) to form a casting ribbon (21) between the die (2) and the support body (1), and a casting film (22) is formed on the support body (1). The film production method has an atmospheric pressure gradient of 2%/mm max. between the inside and the outside of a gap between the shields (25) and the support body (1), in the support body width direction.</p> |
