MULTILAYER OPTICAL FILMS COMPRISING POLYMERS HAVING LOW GLASS TRANSITION TEMPERATURES (TG)

摘要

Multilayer optical films are comprised of materials with glass transition temperatures below room temperature (30° C.). The high refractive index polymers are unique in that they exhibit mechanical properties similar to other low Tg semi-crystalline polymers, yet have significant birefringence (0.05) when strain induced oriented. Novel combinations of comonomers for thermoplastics control the rate of crystallinity for improved processability and flexibility, giving the films crease and crumple recovery advantages.