GASKET FOR BEING APPLIED TO MEDICAL INJECTOR, AND MEDICAL SYRINGE

摘要

PROBLEM TO BE SOLVED: To provide a gasket that has a new configuration capable of satisfying both airtightness and low slidability.SOLUTION: At least a first protrusion 17A provided in such a manner as to annularly protrude backward from a tip side serving as a liquid contact part, a valley part provided in an annularly recessed manner and a second protrusion 17B provided in an annularly protruding manner are formed in a sliding part of a gasket 13. The product α of width D1f and contact pressure P1f analyzed by an FEM of a first peak appearing on the tip side of the first protrusion 17A in the state of being attached within a syringe barrel 11 is designed to satisfy the inequality: 0.4≤α≤1.0.