Long obliquely-stretched film, and circularly polarising plate and organic EL display using long obliquely-stretched film

摘要

A long obliquely-stretched film wound into a roll shape includes a thermoplastic resin and has an orientation angle oriented in a direction inclined with respect to a widthwise direction thereof. In a longitudinal direction of the long obliquely-stretched film, an angle defined between the orientation angle and the widthwise direction has a longitudinal cycle length of 10 mm to less than 1500 mm. An amplitude of the angle is in the range of 0.2° to 1.0° in the longitudinal cycle length.

主权项

1. A long obliquely-stretched film wound into a roll shape, comprising a thermoplastic resin and having an orientation angle oriented in a direction inclined with respect to a widthwise direction thereof,
wherein, in a longitudinal direction of the long obliquely-stretched film, an angle defined between the orientation angle and the widthwise direction has a longitudinal cycle length of 10 mm to less than 1500 mm, and wherein an amplitude of the angle is in the range of 0.2° to 1.0° in the longitudinal cycle length.