MAGNETIC DISK CARTRIDGE

摘要

A magnetic disk cartridge is of the type in which a magnetic disk is rotatably disposed within a jacket. A hardened layer of an ultraviolet ray hardening resin is formed on an inner surface of the jacket which is contacted with a tip of a center pin of a magnetic disk driving apparatus passing through an opening portion of the magnetic disk. The hardness of the hardened layer is 1X1010dyn/cm2 to 1X105dyn/cm2.