Sealing body, cap with the sealing body, and medical container

摘要

An inventive sealing body is a generally disk-like sealing body composed of two or more types of thermoplastic elastomers having different hardnesses, and comprises at least a needle stick part extended in axial direction and an outer edge part surrounding the needle stick part. The outer edge part has a higher hardness than that of the needle stick part. More specifically, a difference in JIS-A hardness between the outer edge part and the needle stick part, for example, is 5 to 15. The sealing body is tightly fitted in a generally cylindrical outer frame body composed of a rigid plastic to provide a cap. The cap is welded to a mouth part of a plastic container or the mouth part is tightly sealed with the sealing body to provide a medical container.