박리 후 횡방향으로 1.5배 연신 후, 150℃에서 건조하여 총 두께가 40㎛인 필름을 제조하였다.
After peeling off, the film was stretched 1.5 times in a transverse direction, and dried at 150°C, thereby preparing a film having a total thickness of 40 μm.