| 摘要 |
<p>This device consists in a metallic lid capable of being easily opened when cut at the score thereof by the seal opener, in which, by adapting a biaxially stretched polyester film provided on the metallic material and extended on at least the inner side of vessel to have x-ray diffraction strength ratio as IA/IB ranging from 4 to 17 as well as in-plane orientation anisotropic index of 30 or under. The pin holes and cracks are prevented from occurring at the scored part, anticorrosiveness of the whole of the lid including the score part is significantly improved, the force for opening the lid is reduced, that is, the opening capability is increased, and occurrence of feathering can be prevented. @(52pp DWg.No. 3B/5)@.</p> |
