| 摘要 |
<p>A disc cartridge comprising a cartridge case (1) having head insert openings and encasing a disc-type recording medium (2) rotatably therein and a shutter (3) for opening or closing the head insert openings (15) and being mounted on the cartridge case (1), the shutter (3) being molded from a synthetic resin material having a water absorbability of not more than 0.05% by weight and a maximum bending strength of not less than 500 kg/cm<2> has a good resistance to deformation by an external force during the working, handling or preservation.</p> |
