| 摘要 |
There are cases in which a change in stress occurring in a substrate is not transmitted to a stress light-emitting layer when the stress light-emitting layer breaks, making it impossible to detect changes in the stress of the substrate. A sheet member having stress light-emitting particles that emit light when stress is applied, wherein the sheet member is characterized in that the sheet member has a first layer and a second layer, the first layer has stress light-emitting particles and has a first contact surface, the second layer is configured from a member softer than the first layer, and the second layer contacts a surface different from the first contact surface of the first layer. |
