| 摘要 |
A reinsertable sealing closure for sealing the open ends of vessels, such as sample collection tubes, for example, vacuum blood collection vials, comprises a two component molded stopper, having a sealing portion of sealing grade thermoplastic clastomer (TPE), for sealing the mouth of the container, and a second portion thermally bonded thereto, providing a seal support structure connecting with an exterior skirt. The closure is injection molded by way of a two-shot process, enabling the selective use of a reduced quantity of sealing grade TPE for the sealing component, secured in bonded relation with lower cost polyolefin interior and exterior support elements. The closure provides long term sealing integrity, while permitting access to the tube contents by way of a hollow needle or cannula inserted axially through a needle acceptance zone of the closure. A drop-containment reservoir surrounding the needle acceptance zone, on the crown of the closure, can receive and contain any stray drops of the tube contents, which may occur upon withdrawal of the needle from the closure, which provision is highly desireable in the case of blood samples, which may be AIDS contaminated. The closure may be incinerated without the generation of toxic products.
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