| 摘要 |
PURPOSE:To completely seal the title container by specifying the hardness, compression set and friction coefficient of a sealing material which is arranged between two members, fixed on one member and slid on the other member. CONSTITUTION:A packing 4 is fixed on a conical movable shutter 3 by means of a bonding agent or the like. The packing 4 is formed by polyurethane with a low foaming ratio and has 3-35 hardness, 3.1% compression set, 0.38 friction coefficient, 80-120mum cell size, and 0.32 apparent specific gravity. A fixed shutter 5 is formed as a cone abutted upon the conical face of the shutter 3, a fan-shaped aperture part 7 connected to a movable shutter 3 is formed, and when an aperture 6 of the movable shutter 3 is shifted from the aperture 7 of the fixed shutter 5, the container is sealed. Thus, said constitution makes it possible to completely seal the container. |
