摘要:
A magnetic recording medium comprising a non-magnetic resin support, and a magnetic layer form on the support. A polyester or polyurethane resin undercoat is formed between the support and the magnetic layer in the form of islands which are isolated from one another.
摘要:
A magnetic recording medium in the form of a tape or a disk comprising a non-magnetic support and a magnetic recording layer formed on at least one side of the support. The magnetic recording layer is made of a dispersion, in a resin binder, of an acicular magnetic powder, a magnetic ferrite powder of a hexagonal system having an axis of easy magnetization along the c axis, and titanium monoxide powder having an average size of from 0.01 to 5 micrometers. The titanium monoxide powder is used in an amount of from 0.1 to 20 wt % based on the total of the acicular magnetic powder and the magnetic ferrite powder.
摘要:
Magnetic recording mediums comprise a non-magnetic support and a magnetic recording layer formed on one side of the support. The magnetic recording layer comprises a magnetic powder dispersed in a specific type of vinyl chloride resin having a --SO.sub.3 M or group, in which M represents a monovalent metal or NH.sub.4, and an epoxy group in the molecule. A back coat layer comprising the specific type of vinyl chloride resin may also be formed on the other side of the support.
摘要:
A magnetic recording medium which comprises a non-magnetic support, a magnetic recording layer formed on one side of the support, and a back coat layer formed on the other side. The back coat layer is made of a dispersion, in a binder resin, of non-magnetic particles on which there is adsorbed carbon black having an average size not larger than 100 millimicrons and a specific surface area not less than 30 m.sup.2 /g.