Leak-free stopper for a syringe assembly having low breakloose and sustaining forces

A thermoplastic elastomer stopper that meets the desired material properties of a stopper for a syringe assembly is disclosed. The compression set of the thermoplastic elastomer stopper of the present disclosure is < 50% when measured at 25% compression for 22 hrs at 70 degree C. The hardness of...

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Bibliographische Detailangaben
Hauptverfasser:	Kaliyamoorthy, Sathya, Cojocariu, Gheorghe, Smith, Chad, Addae-Mensah, Kweku, Giddes, Richard G, Prasad, Shishir, Kulshrestha, Ankur, Bonczynski, Gerald
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	A thermoplastic elastomer stopper that meets the desired material properties of a stopper for a syringe assembly is disclosed. The compression set of the thermoplastic elastomer stopper of the present disclosure is < 50% when measured at 25% compression for 22 hrs at 70 degree C. The hardness of the thermoplastic elastomer stopper of the present disclosure is 40-70 Shore A. The viscosity of a thermoplastic elastomer stopper of the present disclosure is > 70 Pa.s at 1,000 s shear rate, > 12.0 Pa.s at 10,000 s shear rate, and > 3.0 Pa.s at 50,000 s shear rate when measured using a capillary rheometer at 205 degree C (Die: Roundhole 20 mm length / 1 mm diameter / 180 degree inlet, Piston: d = 15 mm, and melting time = 7 min). The present non-lubricated stopper exhibits the required functional performance of a lubricated stopper.