Importance

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Abstract

A stopper for use in injector devices, where the stopper having an outer side configured for engagement with an interior bore of a barrel of the injector device. The stoppers may include an elastomer body, a multi-layer barrier coupled to the elastomer body, the multi-layer barrier having an inner surface oriented toward the elastomer body and an outer surface oriented away from the elastomer body, the multi-layer barrier including a first layer and a second layer, the first layer defining the inner surface and the second layer defining the outer surface, and the multi-layer barrier having at least one micro feature formed by the first layer, the at least one micro feature including one or both of a micro groove and/or a micro rib.

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First Claim