LIGHT CONTROL FILM, LAMINATED LIGHT CONTROL FILM, PRODUCTION METHOD OF LIGHT CONTROL FILM, AND PRODUCTION METHOD OF LAMINATED LIGHT CONTROL FILM

摘要

Light control film having comparatively large crazes or cracks and capable of controlling optical characteristics such as transmitting and scattering at high level, laminated light control film, a production method of light control film, and a production method of laminated light control film. A linear notch pattern with constant intervals is formed by applying a drum's (6) edge (6a) to film F to mechanically transfer the shape of the edge (6a) to the film F. The notch pattern is formed almost in parallel to the axis direction of the drum (6). When this film F is passed around a bend roll (8) while being applied with a specified tension to apply bending stress in the conveying direction of the film F, a craze or a crack is formed in the notch pattern with the notch of the notch pattern as a starting point. Since a craze or a crack is formed with notch pattern as a starting point, a comparatively large craze or crack is obtained to enable high-level control of optical characteristics.