Magnetic recording medium having improved running properties
AssigneeFuji Photo Film Co., Ltd.
InventorsKatsumi Ryoke, Kenichi Masuyama, Takashi Yoneyama, Norio Nasu, Eiichi Tadokoro
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Abstract
A magnetic recording medium comprised of a nonmagnetic support base having a magnetic layer provided thereon is disclosed. The magnetic layer includes ferromagnetic particles dispersed in a binder in combination with carbon black particles. The carbon black particles have an average primary particle size in the range of 30 m.mu. to 50 m.mu.. Further, the carbon black is capable of the adsorption of 120 ml or more of dibutyl phthalate per 100 g of carbon black. By utilizing the particular carbon black of the present invention it is possible to obtain a magnetic recording medium having improved running properties.
Claims20
A magnetic recording medium, comprising:
- a non-magnetic support base having provided thereon;
- a magnetic layer comprised of ferromagnetic particles dispersed in a binder along with carbon black particles having an average primary particle size in the range 30 m.mu. to 50 m.mu., the carbon black being capable of the adsorption of 120 ml or more of dibutyl phthalate per 100 g of carbon black.
Dependencies are inferred from the claim text.