METHOD AND DEVICE FOR MANUFACTURING OBLIQUELY STRETCHED LONG FILM

摘要

A method of manufacturing an obliquely stretched long film includes an oblique stretching step and a tension application step. In the oblique stretching step, a long film is stretched in an oblique direction with respect to a width direction into a stretched film (F). In the tension application step, while the stretched film (F) is being drawn along a longitudinal direction, a tension in a drawing direction is applied to the stretched film (F). Here, in the tension application step, the tension in the drawing direction of the stretched film (F) is changed in the width direction, and thus the stretched film (F) is drawn.

主权项

1. A method of manufacturing an obliquely stretched long film that includes an oblique stretching step of stretching a long film in an oblique direction with respect to a width direction to form the obliquely stretched long film, the method comprising:
a tension application step of applying, while drawing the obliquely stretched long film along a longitudinal direction, a tension in a drawing direction to the obliquely stretched long film, wherein in the tension application step, the tension in the drawing direction of the obliquely stretched long film is changed in the width direction such that the obliquely stretched long film is drawn.