Mold for gasket for prefilled syringe
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKatsushi MAEDA, Junji TASHIRO, Hiroaki NAKANO, Eiji YAO
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Abstract
The present invention aims to provide a gasket for a pre-filled syringe which has excellent air-tightness and liquid-tightness and a mold for forming the gasket. The present invention relate to a mold for a gasket laminated with an inactive film for a pre-filled syringe, wherein at least a surface of the mold which forms a seal sliding surface of an annular protrusion of the gasket is mirror finished to have an arithmetic mean roughness Ra of less than 0.03 μm.
Claims6
A process for preparing a gasket laminated with an inactive film for a pre-filled syringe, the process comprising the step of:
- molding a laminated sheet and an unvulcanized rubber sheet at 155° C. to 200° C. using a mold,
- wherein at least a surface of the mold which forms a seal sliding surface of an annular protrusion of the gasket is mirror finished to have an arithmetic mean roughness Ra of less than 0.03 μm.
Dependencies are inferred from the claim text.