PIERCEABLE STOPPER AND METHOD OF PRODUCING THE SAME

摘要

A PIERCEABLE STOPPER FOR A LIQUID CONTAINER, WHICH HAS A PIERCEABLE PART (11) MADE OF A THERMOPLASTIC SYNTHETIC RESIN ELASTIC MATERIAL. THE PIERCEABLE PART IS FORMED SO AS TO PREVENT LEAKAGE OF LIQUID FROM THE CONTAINER WHEN IT IS PIERCEDWITH A HOLLOW NEEDLE. THE PIERCEABLE PARTIS CONFINED IN A COMPRESSED STATE IN THE STOPPER BODY(10) OF THE PIERCEABLE STOPPER. A MOLTEN THERMOPLASTIC SYNTHETIC RESIN ELASTIC MATERIAL IS INJECTED INTO AN INJECTION MOLD AT AN INJECTION PRESSURE HIGHER THAN THE NORMAL INJECTION PRESSURE TO MOLD THE PIERCEABLE PART.(FIG 2).