WHITE FILM AND SURFACE LIGHT SOURCES WITH THE SAME

摘要

[PROBLEMS] To provide a white film excellent in whiteness, reflecting properties, lightweightness, and dimensional stability under heat and to provide surface light sources improved in brightness characteristics by using the film. [MEANS FOR SOLVING PROBLEMS] A white film containing resin particles in the inside with bubbles formed around the particles, which bears a layer (S layer) where the number-mean particle diameter (Dn) of the resin particles is 1.5µm or below and the resin particles are contained in an amount of 0.05 particle/µm2 or above with the proviso that the proportion of resin particles having diameters of 2µm or above is 15% or below; and surface light sources with the film.