Patent ID: 9039664
Filing Date: 2015-05-26
Classification: A61M,B01L

Abstract:
1. An elastic seal member for a prefilled syringe including a drug containing portion filled with a content liquid, the elastic seal member being adapted to seal the drug containing portion and having a piercing portion to be pierced with a needle for use, the elastic seal member comprising: a seal body of an elastic material; and a protective film laminated to at least a surface portion of the seal body opposed to the drug containing portion, wherein the protective film has a relaxed state wherein the protective film has a first thickness, wherein the protective film has an applied state with the protective film laminated to the surface portion of the seal body, wherein in the applied state, the protective film is changed from the relaxed state by being locally stretched more in the piercing portion than around the piercing portion as a result of which the laminated protective film is locally changed from the first thickness and has a locally smaller thickness in the piercing portion than around the piercing portion.