| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum specimen sampling vessel stopper which is freely attachable/detachable and excellent in needle tube guide- and needle hole seal properties, which demonstrates excellent productivity and by which the degree of pressure reduction is sufficiently kept in a specimen sampling vessel and to provide a method for producing the stopper. SOLUTION: The stopper can seal the opening end part of a specimen sampling tube airtightly so as to keep the inside of the tube in a pressure reduction state in the stopper. A metallic oxide film is formed on the front surface of the stopper. |
