초록 ▼

An vented vial stopper for use in processing freeze-dried products is provided. The stopper includes a vent passageway that is covered with a waterproof and moisture vapor permeable membrane to allow the venting of moisture during the freeze-drying process. The membrane also extends to cover most or

An vented vial stopper for use in processing freeze-dried products is provided. The stopper includes a vent passageway that is covered with a waterproof and moisture vapor permeable membrane to allow the venting of moisture during the freeze-drying process. The membrane also extends to cover most or all of the exposed surface of the stopper to protect the stopper from chemical attack during processing.

대표청구항 ▼

A device for sealing and venting a freeze-drying container that comprises a sealable core adapted to seal an opening in the container, the core having at least one passageway therethrough; a membrane of expanded polytetrafluoroethylene, the membrane being resistant to liquid penetration and permeabl

A device for sealing and venting a freeze-drying container that comprises a sealable core adapted to seal an opening in the container, the core having at least one passageway therethrough; a membrane of expanded polytetrafluoroethylene, the membrane being resistant to liquid penetration and permeable to moisture vapor, the membrane being adhered to the core so as to serve both as a barrier to liquids passing through the passageway and as a protective covering to the core; wherein moisture vapor within the container vents through the membrane and the passageway to outside the container during the freeze-drying process; and wherein the membrane protects resilient core against chemical attack and adhesion to the container.