Sealing stopper for a syringe and a prefilled syringe
AssigneeDaikyo Seiko, Ltd.
InventorsMasamichi Sudo, Tomoyasu Muraki
Life of this patent
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Abstract
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 surface of the rubber body is laminated with a tetrafluoroethylene resin film or ultra-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 kinematic friction coefficient of at most 0.2.
Claims4
A sealing stopper for a syringe, comprising a rubber body laminated with a tetrafluoroethylene resin film or ultra-high molecular weight polyethylene film having an average roughness Ra on the central line of a surface of said resin film or said poluethylene film in a range of at most 0.05 .mu.m and a kinematic friction coefficient of at most 0.2.
A prefilled syringe, comprising an injection cylinder or two-component cylinder for enclosing or sealing a medicament, the medicament being enclosed or sealed by a sealing stopper for a syringe having a rubber body laminated with a tetrafluoroethylene resin film or ultrahigh molecular weight polyethylene film having an average roughness Ra on the central line of a surface of said resin film or said polyethylene film in a range of at most 0.05 .mu.m and a kinematic friction coefficient of at most 0.2.
Dependencies are inferred from the claim text.