METHOD AND APPARATUS FOR PRODUCTION OF AN OBLIQUELY STRETCHED LONG FILM

摘要

A method for producing obliquely stretched long film comprises an oblique stretching step and a folding step. In the oblique stretching step, a long film is stretched in the oblique direction with respect to the widthwise direction to create a stretched film (F). In the folding step, while conveying the stretched film (F) after stretching, the stretched film (F) is folded back at least once on the inner face thereof in a direction parallel or perpendicular to the stretching direction.

主权项

1. A method for production of an obliquely stretched long film involving an oblique stretching step of stretching a long film in a direction oblique to a width direction to form the obliquely stretched long film, the method comprising:
a turning step of, while transporting the obliquely stretched long film after stretching, turning over the stretched film once or more times along a direction parallel or perpendicular to a stretching direction in a plane of the stretched film.