| 摘要 |
PURPOSE:To attain both the cleaning performance and high lubricity of a jacket by attaching a liner having high cleaning performance at a part of each track of a disk within a jacket and another liner having a low coefficient of friction and high lubricity at other part of the track respectively. CONSTITUTION:A disk cleaning liner 1 made of copolymer resin containing, for example, 20% polypropylene and 80% polyester is attached to a part corresponding to a part of each track of a disk within a jacket, i.e., at a place near a head window in a radius form. While a liner 2 made of resin of 100% polyester and having high lubricity is attached at other parts. Thus the dust produced within a jacket is absorbed by the liner 1 which occupies just a minute area of each track. At the same time, the disk revolution is stabilized by the liner 2 which occupies the greater part of the track.
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