| 摘要 |
PURPOSE: To provide a storing vessel capable of holding the quality of an unstable expensive chemical over a long period by providing, on the flange lower surface of a top surface part, a circular sectional dent extending from its outer circumference to the continued part to a leg part on the flange lower surface in a laminated rubber plug used for the sealing of drug or medical vessels. CONSTITUTION: A rubber plug body 1 is formed of a top surface part 2 having a flange part 3 and a leg part 4 fitted into a vessel, and a laminated layer 5 of fluorine resin film is formed on the whole lower surface of the rubber plug, or the whole surface extending from the lower surface of the flange part 3 to the leg part 4. On the lower surface of the flange part 3 for covering the mouth edge of the vessel, a circular sectional dent 6 is formed extending from the outer circumferential part to the base part of the leg part 4. The dispersion in surface precision of the vessel mouth edge is absorbed by the presence of the dent 6 when the rubber plug is put into the vessel, and excellent sealing property is thus provided when the vessel mouth edge is fitted between the leg part 4 base part of the rubber plug or a neck part 7 which is the boundary with the flange lower surface and a flange outer circumference 8. |
