| 摘要 |
PURPOSE:To improve the characteristic for medium and the sticking characteristic by constituting a cartridge case to be made of a thermoplastic synthetic resin and forming a cleaning sheet to be made of mixture paper at least comprising acrylic group fibers and rayon fibers. CONSTITUTION:The cartridge case 1 is made up of a rectangular case sheet made of hard polyvinylchloride and three adhered ridges 5a-5c are provided to three edges for one side end part. A rectangular cleaning sheet having nearly the same area is fixed to one side of a case sheet member by deposition. The cleaning sheet is made of mixed paper of acrylic group fibers and rayon fibers or of mixed paper of acrylic group gibers, rayon fibers and thermally molten fibers. Thus, the magnetic disk cartridge case having the cleaning sheet excellent in the characteristics such as counter medium characteristic and sticking characteristic to the cartridge case is obtained.
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