This invention the butyl rubber/the styrene butadiene rubber which is used with the syringe or medical application container (SBR) is something which offers the sterilization method of the goods, as for the said method, the butyl rubber /SBR elastomer characteristic copolymer make rubber goods (here, as for SBR elastomer characteristic copolymer, the step which is irradiated with composition gross weight as a standard approximately 50% rubber composition is contained from approximately 5%), making use of gamma-ray Next, although the rubber composition which was irradiated, the said rubber composition is sterilized the step which discloses to the sufficient time sterilization gas is included. The rubber composition of this invention which was irradiated and was sterilized is an ability to maintain the performance standard which is superior in regard to seal characteristic, the recoverability, and elasticity from stress.本発明は、シリンジまたは医療用容器で使用されるブチルゴム/スチレンブタジエンゴム(SBR)物品の滅菌方法を提供するものであり、該方法は、ブチルゴム/SBRエラストマー性コポリマー製ゴム物品(ここで、SBRエラストマー性コポリマーは、組成物総重量を基準にして約5%から約50%のゴム組成物を含有する)を、ガンマ線を用いて照射するステップ;次いで、照射されたゴム組成物を、該ゴム組成物を滅菌するのに十分な時間滅菌ガスに曝露するステップを含む。照射され滅菌された本発明のゴム組成物は、封止性、応力からの回復性、および弾性に関して優れた性能基準を維持する能力がある。
