| 摘要 |
<p>PURPOSE:To separate ferromagnetic metal from a base film in a short time by dipping the metal-film type magnetic tape metal-film type into acid solution. CONSTITUTION:A metal-film type magnetic tape in which a ferromagnetic metal film is equipped on a plastic film, is dipped into the solution containing above 1wt% acid (e.g. nitric acid), thereby dissolving a metallic material consisting ferromagnetic metal film in a form of a water suluble salt. Consequently, magnetic material may be easily recovered at high purity as a pure metal component, and it is able to be used for evaporation-material. Further, the base film is never deteriorated because the metal component is disolved in a short time, and the film is recovered as a transparent film. It may be utilized as a material for reclamation.</p> |
