A SEALING STOPPER FOR A SYRINGE AND A PREFILLED SYRINGE

摘要

There can be provided a sealing stopper for a syringe, having very high sealing property and sliding property, and a prefilled syringe using this sealing stopper and capable of preserving a medicament for a long time and operating in easy and precise manner during injecting. This syringe is also excellent in sanitary and operating property during a step of formulation or preservation of a medicament. In this sealing stopper for a syringe, a surf ace of the rubber body is laminated with a tetrafluoroethylene resin film or ult ra-high molecular weight polyethylene film having an average roughness Ra on the central line of the surface in a range of at most 0.05 .mu. m and a kinemati c friction coefficient of at most 0.2.