| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the amount of resin used, prevent oxygen from being picked up at the time of capping and simplify a sterilizing treatment system for a cap by providing an easily openable container by substantially reducing an unplugging torque at the time of opening the cap and by reducing the length of or the thickness of a screw section of a cap main body and a bottle opening part. <P>SOLUTION: A plastic cap 3 has a two-piece structure comprising an outer shell 1 and an inner cap 2 so as to be constructed such that the inner cap is lifted up above an opening part of a container at the terminal end of a shell threaded part 10 to release an air-tightness of the container by applying a rotating force to the outer shell in an unplugging turning direction, the inner cap and the opening part of the container are melted and fixed to each other to cause the container to be sealed and closed and an unplugging torque is 140 N×cm or less. <P>COPYRIGHT: (C)2009,JPO&INPIT |
