| 摘要 |
A wraparound recoverable article comprises longitudinally opposed edge regions which can be brought together to close the article. On recovery of the article a configurational change of or adjacent the closure member can be seen. This can be used as a temperature indicator to show that recovery is complete. Preferably the configurational change is a rotation of the material at the edge regions which results in a white line extending along the length of the closure, and which is not visible before recovery, becoming visible. |
