| 摘要 |
PROBLEM TO BE SOLVED: To provide an inner seal material which can easily detect defects on a manufacturing process of the inner seal material or on opening, enable use of a metal detector for a container or a content, reduce a burned residue, and reduce damage of an incinerator.SOLUTION: The inner seal material is provided in a lid member and seals the container by mounting the lid member on a mouth of the container, and includes an upper sheet material and a lower sheet material. The upper sheet material and the lower sheet material are separably jointed, a barrier film having a barrier layer composed of an inorganic compound is laminated to the lower sheet material, and the lower sheet material can be jointed to the mouth of the container at a surface of the lower sheet opposite to the joint face of the upper sheet material. |
