BASE FILM FOR GROOVED FLOPPY DISK FOR TRANSMISSION TYPE OPTICAL SERVOMECHANISM

摘要

PURPOSE:To provide a base film for a grooved floppy disk for a transmission type servomechanism excellent in transparency and slidability. CONSTITUTION:A polyester layer (B) contg. inert particles is laminated on at least one side of a polyester layer (A) not practically contg. particles. The thickness of the polyester layer B is <=8mum, the roughness RaB of the exposed surface of the layer B is 0.002-0.015mum and the light transmissivity (%) of the resulting laminated film is 85-99%.