| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal board, a sealing method, a seal device, and a container, which can form a resin sump by a heat seal even in a thin member of the container so as to obtain high sealability.SOLUTION: A seal part 1A of an annular seal board 1 is provided with a curved surface part 12, the inner peripheral edge of which is curved, and an inclined surface part 11 provided to be connected to the curved surface part 12 and inclined to a surface to be heat sealed on the outer peripheral edge side. The radius of curvature of the curved surface part 12 is set larger than 0.5H. Even when a thin container body and a lid member are heat sealed, a resin pool can be formed in the vicinity of the inner peripheral edge of the heat seal part corresponding to the inner peripheral edge of the seal part 1A so that a heat seal having high sealability and easily opening performance can be obtained. |
