Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsAkihiro Matsufuji, Akira Kasuga, Shigeo Komine, Yasuyuki Yamada, Hajime Miyatsuka
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AssigneeFuji Photo Film Co., Ltd.
InventorsAkihiro Matsufuji, Akira Kasuga, Shigeo Komine, Yasuyuki Yamada, Hajime Miyatsuka
Estimating the term…
In a magnetic recording medium such as a video tape comprising a nonmagnetic support and a magnetic recording layer provided on the support, said magnetic recording layer comprising a binder and a ferromagnetic powder dispersed therein, the improvement in which: the magnetic recording layer comprises a fatty acid ester lubricant and a lubricant other than the fatty acid ester lubricant; the binder is composed of a resin component comprising a resin containing a repeating unit which has a polar group and having a glass transition point of not lower than 50.degree. C., and a resin containing a repeating unit which has a polar group and having a glass transition point of lower than 50.degree. C; and at least one resin of the resins contains a repeating unit having a polar group such as --SO.sub.3 M, --OSO.sub.3 M or --PO(OM').sub.2, wherein M is hydrogen or an alkali metal atom, and M' is hydrogen, an alkali metal atom or a lower hydrocarbon group.
A magnetic recording medium comprising a non-magnetic support and a magnetic recording layer provided on the support, said magnetic recording layer comprising a binder and a ferromagnetic powder dispersed therein, which is characterized in that:
Dependencies are inferred from the claim text.