| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently ensure the strength in the joined part between mutual titanium coating film materials by providing a joining method proper to the titanium coating film material formed by coating one surface of a resin material with a titanium oxide layer. SOLUTION: On the basis of a conventional joining method wherein the adjacent parts of titanium coating film materials are mutually overlapped over constant width and the titanium coating film materials are mutually welded at the overlapped part to join the titanium coating film materials, the titanium oxide film 3 within the contact range with the other titanium coating film material is removed at the overlapped part of the titanium coating film materials to weld the overlapped part. |
