| abstract |
A nozzle cap ( 1 ) is provided, which is formed from a rubber composition containing a rubber component including a diene rubber and a non-diene rubber, wherein the diene rubber is present in a proportion of 20 to 70 parts by mass based on 100 parts by mass of the total of the rubbers in the rubber composition. The nozzle cap ( 1 ) has a moderate gas transmission property and, hence, can be quickly sterilized by EOG sterilization and steam sterilization, quickly removed of residues by deaeration, and quickly dried in a shorter period after the steam sterilization. In addition, the nozzle cap ( 1 ) is less liable to be loosened due to increase in internal pressure and compression set and detached from the nozzle, and has a reduced leaching substance amount before and after the sterilization. |