| 摘要 |
PROBLEM TO BE SOLVED: To provide a cap sealing method for a container facilitating the handling of a cap seal.SOLUTION: A cap sealing method seals a spear valve 105 of a barrel 100 by thermally shrinking a shrink film 110. The cap sealing method includes: a protection step of protecting a first area A of the shrink film 110 formed at the spear valve 105 of the barrel 100 and positioned at an upper surface 105a of the spear valve 105 from heat for shrinking a second area B formed at the periphery of the first area A; and a shrinkage step of wrapping the shrink film 110 shrunk at a lower part of the spear valve 105 by heating the second area B. In the shrinkage step, the heating of a part of the second area B is restricted to form a shrinkage restriction part C having a different degree of shrinkage. |
