Disk cartridge with fibrous cleaning member having set density rate of change

摘要

A cleaning member is used for cleaning a magnetic disk by rubbing the cleaning member in a sliding manner against the surface of the magnetic disk. The cleaning member is a sheet-like fibrous member having a density of no more than 0.10 g/cm3 at a load of 4.4 gf/cm2; with the rate of change of the density over a load range of 0.1-4.4 gf/cm2 being at least 4x10-3 (g/cm3)/(gf/cm2).