| 摘要 |
PURPOSE:To provide an easy-to-peel film which is extremely little in a change rate of curling by the change with the environment and lapse of time, the devel oper housing container which enables automation at the time of assembling and has good operability at the time of use and the process cartridge for which this container is used. CONSTITUTION:The easy-to-peel film X is composed of a polyester film (first base material) A having 10 to 30mum thickness, a polyester film (second base material) B having 10 to 30mum thickness, a polyethylene layer (cushion layer) C having 10 to 30mum thickness and a sealant layer D contg. an ethylene=vinyl acetate copolymer having 30 to 50mum thickness. The aperture of the developer housing container is sealed by this easy-to-peel film X. Further, the process cartridge is constituted by including this developer housing container therein. The change rate of curling of the easy-to-peel film X is extremely minimized in spite of the change with environment and lapse of time. |
