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US 4,726,992 AGranted
Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsTakamitsu Asai, Masaaki Fujiyama, Takahito Miyoshi, Yasuyuki Yamada
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AssigneeFuji Photo Film Co., Ltd.
InventorsTakamitsu Asai, Masaaki Fujiyama, Takahito Miyoshi, Yasuyuki Yamada
Estimating the term…
A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer having magnetic particles being ferromagnetic hexagonal crystallized tabular shape particles having an axis of easy magnetization in a direction vertical to a flat surface thereof, said binder being present in an amount of from 10 to 30 wt % based on the weight of the magnetic particles, and said binder comprising a polycarbonate polyurethane being present in an amount of from 20 to 60 wt %, a vinyl chloride and vinyl acetate type copolymer being present in an amount of from 20 to 70 wt %, and a polyisocyanate being present in an amount of from 10 to 60 wt %, based on the total amount of binder.
A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer having magnetic particles dispersed in a binder, the magnetic particles being ferromagnetic hexagonal crystallized tabular shape particles having an axis of easy magnetization in a direction vertical to a flat surface thereof, said binder being present in an amount of from 10 to 30 wt% based on the weight of the magnetic particles, and said binder comprising a polycarbonate polyurethane being present in an amount of from 20 to 60 wt%, a vinyl chloride and vinyl acetate copolymer being present in an amount of from 20 to 70 wt%, and a polyisocyanate being present in an amount of from 10 to 60 wt%, based on the total amount of binder.
Dependencies are inferred from the claim text.