| abstract |
(57) [Summary] [Purpose] The oxygen absorber can be reliably shielded from the contents of the container while maintaining a high oxygen transmission rate to the oxygen absorber. In addition, an optimal oxygen-absorbing disk is provided by being provided on the back surface of the cap of the container, which can exhibit high oxygen-absorbing performance during use. A disc provided on the back surface of a cap of a container, comprising at least an oxygen absorber layer 1 in which an oxygen absorber is embedded in a resin, the oxygen absorber layer 1 being located inside the container, and having a thickness direction. An oxygen-absorbing disk, which is a laminate comprising an oxygen-permeable layer 2 having an asymmetric porous layer having a dense thin film layer formed on the inner side of the container. |