| 摘要 |
<p>1,079,892. Magnetic structures. FUJI SHASHIN FILM KABUSHIKI KAISHA. Jan. 25, 1965 [Jan. 27, 1964], No. 3265/65. Heading H1H. A magnetic recording medium, e.g. a magnetic tape, comprises a support bearing a magnetic layer which contains between 5% and 30% by weight of graphite based on the weight of the magnetic substance in the magnetic layer. The graphite which may be amorphous or flaky acts as an anti-friction and anti-static agent. In an example the magnetic layer has a composition as follows in parts by weight.γ-Fe 2 O 3 300; vinyl acetate 70; nitro-cellulose 40; plasticizer 30; graphite 80; butyl acetate 800.</p> |
