| 摘要 |
PURPOSE:To improve a pair media characteristic and a fixing characteristic by using a sheet member having a case side unwoven fabric layer composed of an unwoven fabric to contain a fiber buried in the inner surface side of a cartridge case while a part approximately holds the mode of the fiber. CONSTITUTION:A polyvinyl chloride sheet constituting a cartridge case 1 is softened, plasticized and starts to melt by a rising temperature. On the other hand, the rayon fiber in a case side unwoven fabric layer 16 is not softened and melted and starts to heat and dissolve, and for such a reason, when a cleaning sheet 3 is thermally deposited to the cartridge case 1, a rayon fiber 24 in the case side unwoven fabric layer 16 is buried in the inner surface side of the cartridge case 1 while the mode of the fiber is held. Since most of the cross section shape of the rayon fiber 24 is non-circular, this is buried in the cartridge case 1, and then, the cleaning sheet 3 is tightly fixed and supported without fail.
|
