| 摘要 |
<p>Rubber plug for a vial, consists of a rubber plug body (1), and a polyethylene sheet (3) having average molecular weight of 1,3000,000-8,000,000 laminated on the entire surface of the plug body, or the portion of the rubber plug which touches an inner circumferential surface (4) of a mouth portion of a vial (7) and the portion (5) of the plug which touches medicine or a top surface (1b) of the plug. Since a part of the molecular chain of the polyethylene branches due to thermal decomposition and partially crosslinks with the rubber in the rubber plug as a whole, the bond strength of the poylethylene sheet (3) is high. Also, the surface smoothness of the sheet is improved.</p> |
